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Simplifying 8r2 + 6r + -14 = -10 Reorder the terms: -14 + 6r + 8r2 = -10 Solving -14 + 6r + 8r2 = -10 Solving for variable 'r'. Reorder the terms: -14 + 10 + 6r + 8r2 = -10 + 10 Combine like terms: -14 + 10 = -4 -4 + 6r + 8r2 = -10 + 10 Combine like terms: -10 + 10 = 0 -4 + 6r + 8r2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-2 + 3r + 4r2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-2 + 3r + 4r2)' equal to zero and attempt to solve: Simplifying -2 + 3r + 4r2 = 0 Solving -2 + 3r + 4r2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -0.5 + 0.75r + r2 = 0 Move the constant term to the right: Add '0.5' to each side of the equation. -0.5 + 0.75r + 0.5 + r2 = 0 + 0.5 Reorder the terms: -0.5 + 0.5 + 0.75r + r2 = 0 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + 0.75r + r2 = 0 + 0.5 0.75r + r2 = 0 + 0.5 Combine like terms: 0 + 0.5 = 0.5 0.75r + r2 = 0.5 The r term is 0.75r. Take half its coefficient (0.375). Square it (0.140625) and add it to both sides. Add '0.140625' to each side of the equation. 0.75r + 0.140625 + r2 = 0.5 + 0.140625 Reorder the terms: 0.140625 + 0.75r + r2 = 0.5 + 0.140625 Combine like terms: 0.5 + 0.140625 = 0.640625 0.140625 + 0.75r + r2 = 0.640625 Factor a perfect square on the left side: (r + 0.375)(r + 0.375) = 0.640625 Calculate the square root of the right side: 0.80039053 Break this problem into two subproblems by setting (r + 0.375) equal to 0.80039053 and -0.80039053.Subproblem 1
r + 0.375 = 0.80039053 Simplifying r + 0.375 = 0.80039053 Reorder the terms: 0.375 + r = 0.80039053 Solving 0.375 + r = 0.80039053 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + r = 0.80039053 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + r = 0.80039053 + -0.375 r = 0.80039053 + -0.375 Combine like terms: 0.80039053 + -0.375 = 0.42539053 r = 0.42539053 Simplifying r = 0.42539053Subproblem 2
r + 0.375 = -0.80039053 Simplifying r + 0.375 = -0.80039053 Reorder the terms: 0.375 + r = -0.80039053 Solving 0.375 + r = -0.80039053 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + r = -0.80039053 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + r = -0.80039053 + -0.375 r = -0.80039053 + -0.375 Combine like terms: -0.80039053 + -0.375 = -1.17539053 r = -1.17539053 Simplifying r = -1.17539053Solution
The solution to the problem is based on the solutions from the subproblems. r = {0.42539053, -1.17539053}Solution
r = {0.42539053, -1.17539053}
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